Rename and move eln system directory

Rename eln sys directory into 'native-lisp' and move it from
"$(DESTDIR)${libexecdir}/emacs/${version}/${configuration}/" to
"$(DESTDIR)${libdir}/emacs/".

Add to the directory name used to disambiguate the eln compatibility
the Emacs version to have it more user friendly.

	* Makefile.in (clean, install-eln): Rename eln-cache into
	native-lisp.
	(ELN_DESTDIR): Move from
	'$(DESTDIR)${libexecdir}/emacs/${version}/${configuration}/' to
	'$(DESTDIR)${libdir}/emacs/'.

	* lisp/loadup.el: Update for comp-native-path-postfix ->
	comp-native-version-dir rename.

	* src/comp.c (syms_of_comp): Rename eln-cache -> native-lisp.
	(syms_of_comp, Fcomp_el_to_eln_filename): Rename
	comp-native-path-postfix -> comp-native-version-dir.
	(hash_native_abi): Rework and add emacs-version to
	comp-native-version-dir.

Makefile.in

@@ -332,7 +332,7 @@ CONFIG_STATUS_FILES_IN = \
 COPYDIR = ${srcdir}/etc ${srcdir}/lisp
 COPYDESTS = "$(DESTDIR)${etcdir}" "$(DESTDIR)${lispdir}"
 
-ELN_DESTDIR = "$(DESTDIR)${libexecdir}/emacs/${version}/${configuration}/"
+ELN_DESTDIR = "$(DESTDIR)${libdir}/emacs/"
 
 all: ${SUBDIR} info
 
@@ -760,7 +760,7 @@ install-etc:
 ### Install native compiled Lisp files.
 install-eln:
 ifeq ($(HAVE_NATIVE_COMP),yes)
-	find eln-cache -type f -exec ${INSTALL_DATA} -D "{}" "$(ELN_DESTDIR){}" \;
+	find native-lisp -type f -exec ${INSTALL_DATA} -D "{}" "$(ELN_DESTDIR){}" \;
 endif
 
 ### Build Emacs and install it, stripping binaries while installing them.
@@ -873,7 +873,7 @@ clean: $(clean_dirs:=_clean)
 	[ ! -d test ] || $(MAKE) -C test $@
 	-rm -f ./*.tmp etc/*.tmp*
 	-rm -rf info-dir.*
-	-rm -rf eln-cache
+	-rm -rf native-lisp
 
 ### 'bootclean'
 ###      Delete all files that need to be remade for a clean bootstrap.

lisp/loadup.el

@@ -458,7 +458,7 @@ lost after dumping")))
         (eln-dest-dir (cadr (member "--eln-dest" command-line-args))))
     (when (and bin-dest-dir eln-dest-dir)
       (setq eln-dest-dir
-            (concat eln-dest-dir "eln-cache/" comp-native-path-postfix "/"))
+            (concat eln-dest-dir "native-lisp/" comp-native-version-dir "/"))
       (mapatoms (lambda (s)
                   (let ((f (symbol-function s)))
                     (when (subr-native-elisp-p f)

src/comp.c

@@ -771,21 +771,19 @@ comp_hash_source_file (Lisp_Object filename)
 void
 hash_native_abi (void)
 {
-  Lisp_Object string = Fmapconcat (intern_c_string ("subr-name"),
-				   Vcomp_subr_list, build_string (" "));
-  Lisp_Object digest = comp_hash_string (string);
-
   /* Check runs once.  */
   eassert (NILP (Vcomp_abi_hash));
-  Vcomp_abi_hash = digest;
-  /* If 10 characters are usually sufficient for git I guess 16 are
-     fine for us here.  */
-  Vcomp_native_path_postfix =
-    concat2 (Vsystem_configuration,
-	     concat2 (make_string ("-", 1),
-		      Fsubstring_no_properties (Vcomp_abi_hash,
-						make_fixnum (0),
-						make_fixnum (16))));
+
+  Vcomp_abi_hash =
+    comp_hash_string (Fmapconcat (intern_c_string ("subr-name"),
+				  Vcomp_subr_list, build_string ("")));
+  Lisp_Object separator = build_string ("-");
+  Vcomp_native_version_dir =
+    concat3 (Vemacs_version,
+	     separator,
+	     concat3 (Vsystem_configuration,
+		      separator,
+		      Vcomp_abi_hash));
 }
 
 static void
@@ -4057,7 +4055,7 @@ If BASE-DIR is nil use the first entry in `comp-eln-load-path'.  */)
     base_dir = Fexpand_file_name (base_dir, Vinvocation_directory);
 
   return Fexpand_file_name (filename,
-			    concat2 (base_dir, Vcomp_native_path_postfix));
+			    concat2 (base_dir, Vcomp_native_version_dir));
 }
 
 DEFUN ("comp--init-ctxt", Fcomp__init_ctxt, Scomp__init_ctxt,
@@ -5293,9 +5291,9 @@ native compiled one.  */);
   DEFVAR_LISP ("comp-abi-hash", Vcomp_abi_hash,
 	       doc: /* String signing the ABI exposed to .eln files.  */);
   Vcomp_abi_hash = Qnil;
-  DEFVAR_LISP ("comp-native-path-postfix", Vcomp_native_path_postfix,
-	       doc: /* Postifix to be added to the .eln compilation path.  */);
-  Vcomp_native_path_postfix = Qnil;
+  DEFVAR_LISP ("comp-native-version-dir", Vcomp_native_version_dir,
+	       doc: /* Directory in use to disambiguate eln compatibility.  */);
+  Vcomp_native_version_dir = Qnil;
 
   DEFVAR_LISP ("comp-deferred-pending-h", Vcomp_deferred_pending_h,
 	       doc: /* Hash table symbol-name -> function-value.  For
@@ -5316,7 +5314,7 @@ The last directory of this list is assumed to be the system one.  */);
   /* Temporary value in use for boostrap.  We can't do better as
      `invocation-directory' is still unset, will be fixed up during
      dump reload.  */
-  Vcomp_eln_load_path = Fcons (build_string ("../eln-cache/"), Qnil);
+  Vcomp_eln_load_path = Fcons (build_string ("../native-lisp/"), Qnil);
 
 #endif /* #ifdef HAVE_NATIVE_COMP */